I am planning to reapply this year after not being satisfied with my results last year. In this case, Do I need to get new LOR's and other material(undergraduate reports etc.)or can I use the ones I used last year?

I am a South Korean and I have received all my education totally in Korea. My LSAT is 166 and LSDAS GPA is 3.9There aren't many students wanting to go to a US law school in my country so I don't have much info I can get from people around me. I've received all my recommendation letters and only have my essay left. Please give me some advice on which schools to apply and what my chances would be.Also, would my experiences in working for a law firm help?